Audio listening system



FIG. 1 is a front perspective view of an audio listening system showing the claimed design;

FIG. 2 is a rear view thereof:

FIG. 3 is a front view thereof;

FIG. 4 is a left side perspective view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a right side view thereof.

The broken lines in the figures show portions of the audio listening system that form no part of the claimed design. 

CLAIM The ornamental design for an audio listening system, as shown and described. 